Source device for an audio system



FIG. 1 is a perspective view of a source device for an audio system;

FIG. 2 is another perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof. 

The ornamental design for an source device for an audio system, as shown and described. 